One-step microwave synthesized core–shell structured selenium@carbon spheres as cathode materials for rechargeable lithium batteries

Abstract

A core–shell structured selenium@carbon composite material was obtained by a facile one-step microwave synthesis method. The uniform carbon shells coated on selenium spheres greatly minimized the shuttle effect of Li–Se cells. The morphology analysis of the cathodes after different cycles revealed that the Se cores were perfectly confined inside the unbroken C shells all through the 100 cycles.